linux.git/arch/arm/kernel/smp.c, branch v2.6.22 Linux kernel source tree [ARM] Mark SMP local timer and IPI as exception entries 2007-05-08T10:31:07+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2007-05-08T10:31:07+00:00 b9811d7fde6136bb3dc78dd4f4dd4f54be725b25 This allows the backtrace to dump the exception stack contents. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
This allows the backtrace to dump the exception stack contents.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] Export smp_call_function() 2006-11-26T16:39:00+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2006-11-25T20:15:12+00:00 e730bf96c89b27b2a90ae3e8054dae6133b4f90b smp_call_function() will be used with the MP/core oprofile support patch. Export it as _GPL. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
smp_call_function() will be used with the MP/core oprofile support
patch.  Export it as _GPL.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] Fix SMP irqflags support 2006-10-28T09:15:31+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2006-10-25T12:59:16+00:00 c97d4869a23c439d2bc23cb26c1147c099f9ff78 The IRQ changes a while back broke the build for SMP machines. Fix up the SMP code to use set_irq_regs/get_irq_regs as appropriate. Also, fix a warning in arch/arm/kernel/time.c where 'regs' becomes unused for SMP builds. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The IRQ changes a while back broke the build for SMP machines.
Fix up the SMP code to use set_irq_regs/get_irq_regs as
appropriate.  Also, fix a warning in arch/arm/kernel/time.c
where 'regs' becomes unused for SMP builds.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[PATCH] cpumask: export cpu_online_map and cpu_possible_map consistently 2006-10-02T14:57:17+00:00 Greg Banks gnb@melbourne.sgi.com 2006-10-02T09:17:40+00:00 e16b38f71322efd8a221f64b6ddc0748d21d2e1a cpumask: ensure that the cpu_online_map and cpu_possible_map bitmasks, and hence all the macros in <linux/cpumask.h> that require them, are available to modules for all supported combinations of architecture and CONFIG_SMP. Signed-off-by: Greg Banks <gnb@melbourne.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> 
cpumask: ensure that the cpu_online_map and cpu_possible_map bitmasks, and
hence all the macros in <linux/cpumask.h> that require them, are available to
modules for all supported combinations of architecture and CONFIG_SMP.

Signed-off-by: Greg Banks <gnb@melbourne.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Remove obsolete #include <linux/config.h> 2006-06-30T17:25:36+00:00 Jörn Engel joern@wohnheim.fh-wedel.de 2006-06-30T17:25:36+00:00 6ab3d5624e172c553004ecc862bfeac16d9d68b7 Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de> 
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
[ARM] SMP: don't set cpu_*_map in smp_prepare_boot_cpu 2006-03-25T21:37:29+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2006-03-25T21:37:29+00:00 091c539f08a6700e0cca8cd620c3d72dd9f9e2bb The recent addition of boot_cpu_init() implements the initialisation of the online, present and possible cpu maps for the boot CPU, so there is no reason to duplicate this in the architecture smp_prepare_boot_cpu() hook. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The recent addition of boot_cpu_init() implements the initialisation
of the online, present and possible cpu maps for the boot CPU, so
there is no reason to duplicate this in the architecture
smp_prepare_boot_cpu() hook.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] Fix SMP initialisation oops 2006-02-16T11:08:09+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2006-02-16T11:08:09+00:00 7bbb79403163e047c6e333ff169db34e3c969e65 A change to the SMP initialisation caused the following oops: CPU1: Booted secondary processor CPU1: D VIPT write-back cache CPU1: I cache: 32768 bytes, associativity 4, 32 byte lines, 256 sets CPU1: D cache: 32768 bytes, associativity 4, 32 byte lines, 256 sets <7>Calibrating delay loop... 83.14 BogoMIPS (lpj=415744) <1>Unable to handle kernel NULL pointer dereference at virtual address 0000001c ... PC is at enqueue_task+0x1c/0x64 LR is at activate_task+0xcc/0xe4 SMP initialisation now requires cpu_possible_map to be initialised in setup_arch(). Move this from smp_prepare_cpus() to smp_init_cpus() and call it from our setup_arch() if CONFIG_SMP is enabled. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
A change to the SMP initialisation caused the following oops:

 CPU1: Booted secondary processor
 CPU1: D VIPT write-back cache
 CPU1: I cache: 32768 bytes, associativity 4, 32 byte lines, 256 sets
 CPU1: D cache: 32768 bytes, associativity 4, 32 byte lines, 256 sets
 <7>Calibrating delay loop... 83.14 BogoMIPS (lpj=415744)
 <1>Unable to handle kernel NULL pointer dereference at virtual address 0000001c
 ...
 PC is at enqueue_task+0x1c/0x64
 LR is at activate_task+0xcc/0xe4

SMP initialisation now requires cpu_possible_map to be initialised in
setup_arch().  Move this from smp_prepare_cpus() to smp_init_cpus()
and call it from our setup_arch() if CONFIG_SMP is enabled.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[PATCH] arm: task_stack_page() 2006-01-12T17:08:56+00:00 Al Viro viro@ftp.linux.org.uk 2006-01-12T09:05:58+00:00 32d39a9355780bc9aadcf76a2d2004bdbe0f4665 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[ARM] Restore apparant pointless change in arch/arm/kernel/smp.c 2005-11-12T17:21:47+00:00 Russell King rmk@dyn-67.arm.linux.org.uk 2005-11-12T17:21:47+00:00 da2660d2c40496b1699c4de652f6d0cfd13937c0 Restore smp.c back to how it used to be. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Restore smp.c back to how it used to be.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[PATCH] sched: disable preempt in idle tasks 2005-11-09T15:56:33+00:00 Nick Piggin nickpiggin@yahoo.com.au 2005-11-09T05:39:01+00:00 5bfb5d690f36d316a5f3b4f7775fda996faa6b12 Run idle threads with preempt disabled. Also corrected a bugs in arm26's cpu_idle (make it actually call schedule()). How did it ever work before? Might fix the CPU hotplugging hang which Nigel Cunningham noted. We think the bug hits if the idle thread is preempted after checking need_resched() and before going to sleep, then the CPU offlined. After calling stop_machine_run, the CPU eventually returns from preemption and into the idle thread and goes to sleep. The CPU will continue executing previous idle and have no chance to call play_dead. By disabling preemption until we are ready to explicitly schedule, this bug is fixed and the idle threads generally become more robust. From: alexs <ashepard@u.washington.edu> PPC build fix From: Yoichi Yuasa <yuasa@hh.iij4u.or.jp> MIPS build fix Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> 
Run idle threads with preempt disabled.

Also corrected a bugs in arm26's cpu_idle (make it actually call schedule()).
How did it ever work before?

Might fix the CPU hotplugging hang which Nigel Cunningham noted.

We think the bug hits if the idle thread is preempted after checking
need_resched() and before going to sleep, then the CPU offlined.

After calling stop_machine_run, the CPU eventually returns from preemption and
into the idle thread and goes to sleep.  The CPU will continue executing
previous idle and have no chance to call play_dead.

By disabling preemption until we are ready to explicitly schedule, this bug is
fixed and the idle threads generally become more robust.

From: alexs <ashepard@u.washington.edu>

  PPC build fix

From: Yoichi Yuasa <yuasa@hh.iij4u.or.jp>

  MIPS build fix

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>